But that's just relying on handbooks and guides, when we've seen Batman doing more than any human does.
Case in point, his lifestyle.
He parties as hard as Paris Hilton.
He actually has a pretty hands on responsibility with Waynetech; think Zuckerberg. As soon as a new development in R+D comes up, he knows about it, and takes it, for example.
On top of that, he trains. And not just martial arts forms (all 127 of them), but also weight training, cardio etc. He's strong enough to bench 1000lbs or whatever it is, and yet, agile enough to do gymnastics, and yet, fast enough to outsprint most people.
AND then he fights crime.
AND then sleeps.
And somehow, he's in his mid 30s, but holds multiple ADVANCED degrees in a variety of fields, knows several languages AND is an excellent and skilled sportsman, and still parties hard enough to convince people he's a playboy.
Apparently, that's all human-level. Because we just use handbooks.